Dorsey took $100 from Mike with the swipe of a credit card. Mike was concerned about Dorsey’s intentions for the money, but it will actually go towards Charity Water as a donation, Dorsey assured. He then sat down to talk a bit with Mike and Erick Schonfeld about Square, and his experience raising funding.

At the end of the interview, Mike asked the audience if anyone would be willing to use Square to donate $1,000 to Charity Water. Mahalo CEO Jason Calacanis graciously volunteered. Then, after being humorously called out, so did Google (thanks to developer evangelist Don Dodge).